From 2D layer to 2D → 3D parallel interpenetration: Syntheses, structures and luminescent properties

<div><p></p><p>Two new coordination polymers based on 1,1’-(1,4-butanediyl)bis(imidazole) (bbi) and 5-hydroxyisophthalic acid (OH-BDC), [Co<sub>2</sub>(HO-BDC)<sub>2</sub>(bbi)<sub>2</sub>]·H<sub>2</sub>O (<b>1</b>) and [Zn(HO-BDC)(bbi)] (<b>2</b>), have been hydrothermally synthesized. The complexes were characterized by single crystal X-ray diffraction, IR and elemental analysis. The structure determination reveals that <b>1</b> manifests a deeply corrugated 2D layer with a (4,4) lattice. For <b>2</b>, there is a highly undulating 2D (4,4) layer structure. The layers penetrate by each other to give a 2D → 3D parallel interpenetrating network. Fluorescence properties and thermal stabilities of <b>1</b> and <b>2</b> in the solid state have been studied.</p></div>